Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Let air circulate but keep it water tight?

  1. Jul 2, 2010 #1
    Is this the opposite of an air lock?

    I want to make a bag/membrane/lock device that can carry water, yet keep it aerated.

    Obviously a cup does this, but I need it to be able to move about vigorously without spilling.

    Any ideas what this is called?
  2. jcsd
  3. Jul 2, 2010 #2
    A cup with a lid.
  4. Jul 2, 2010 #3

    I mean fresh air (Oxygen) into the watertight container! (not recirculated)
  5. Jul 6, 2010 #4
    Just use a straw to blow air into it from time to time...
  6. Jul 7, 2010 #5

    Filip Larsen

    User Avatar
    Gold Member

    You could perhaps place a small check valve in the air supply inlet. Depending on how much water the container holds and how it moves during acceleration you may be able to find a check pressure that will allow air to enter with a minimum of over-pressure which then could be supplied by a small pump, your lungs (as suggested), or perhaps by the movement of the container itself.
  7. Jul 8, 2010 #6


    User Avatar
    Science Advisor

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook